Stock-Based Compensation - Summary of Stock Options Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	4 Months Ended	12 Months Ended
	Jan. 01, 2019	Jan. 01, 2019	Jan. 02, 2018
Shares
Options outstanding, beginning of period (in shares)		417,000
Granted (in shares)	106,000	106,000
Exercised (in shares)		(21,750)
Forfeited (in shares)		(48,000)
Options outstanding, end of period (in shares)	453,250	453,250	417,000
Options exercisable (in shares)	187,996
Options exercisable and expected to vest (in shares)	425,954
Weighted Average Exercise Price
Weighted Average Exercise Price, beginning balance (in dollars per share)		$ 11.04
Weighted Average Exercise Price, Granted (in dollars per share)		14.04
Weighted Average Exercise Price, Exercised (in dollars per share)		10.22
Weighted Average Exercise Price, Forfeited (in dollars per share)		11.43
Weighted Average Exercise Price, end of period (in dollars per share)	$ 11.74	$ 11.04	$ 11.04
Weighted Average Exercise Price, Options exercisable (in dollars per share)	10.57
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term		4 years 3 months 11 days
Weighted Average Exercise Price, Options exercisable and expected to vest (in dollars per share)	$ 11.65
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted Average Remaining Contractual Term, Options outstanding (in years)		4 years 11 months 23 days	5 years 6 months
Weighted Average Remaining Contractual Term, Options excercisable and expected to vest (in years)		4 years 11 months 5 days
Aggregate Intrinsic Value, Options outstanding	$ 77		$ 641
Aggregate Intrinsic Value, Options exercisable	38
Aggregate Intrinsic Value, Options exercisable and expected to vest	$ 74